using System;
using System.Collections.Generic;

namespace PetaPoco
{
    /// <summary>
    /// A helper class which enables fluent configuration.
    /// </summary>
    public class DatabaseConfiguration : IDatabaseBuildConfiguration, IBuildConfigurationSettings, IHideObjectMethods
    {
        private readonly IDictionary<string, object> _settings = new Dictionary<string, object>();

        /// <summary>
        /// Private constructor to force usage of static build method.
        /// </summary>
        private DatabaseConfiguration()
        {
        }

        void IBuildConfigurationSettings.SetSetting(string key, object value)
        {
            // Note: no argument checking because, pref, enduser unlikely and handled by RT/FW
            if (value != null)
                _settings[key] = value;
            else
                _settings.Remove(key);
        }

        void IBuildConfigurationSettings.TryGetSetting<T>(string key, Action<T> onGetAction, Action onFailAction)
        {
            // Note: no argument checking because, pref, enduser unlikely and handled by RT/FW
            if (_settings.TryGetValue(key, out var setting))
                onGetAction((T) setting);
            else
                onFailAction?.Invoke();
        }

        /// <summary>
        /// Starts a new PetaPoco build configuration.
        /// </summary>
        /// <returns>An instance of <see cref="IDatabaseBuildConfiguration"/> to form a fluent interface.</returns>
        public static IDatabaseBuildConfiguration Build()
        {
            return new DatabaseConfiguration();
        }
    }
}
